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A comment on The first chosen-prefix collision for SHA-1. Parent comment

Re:The first chosen-prefix collision for SHA-1 by tedunangst on Tuesday January 07, 2020 @10:38AM (#21980939)
What if somebody makes an attack where they can choose the size and then find a collision?
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Re:The first chosen-prefix collision for SHA-1 by banana_giraffe on Tuesday January 07, 2020 @11:10AM (#21981277)
Like the two files on the linked page?
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Re:The first chosen-prefix collision for SHA-1 by Skunkleton on Tuesday January 07, 2020 @01:43PM (#21983137)
The two files on the linked page were both full of junk data. I suspect that those files being of the same length isn't the norm.
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Re:The first chosen-prefix collision for SHA-1 by Thorrez on Tuesday January 07, 2020 @11:22PM (#21988313)
Why wouldn't it be the norm? If they're able to make files of the same length, other attackers can make files of the same length too.
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Re:The first chosen-prefix collision for SHA-1 by aidenn0 on Tuesday January 07, 2020 @03:24PM (#21984392)
I would bet that a fixed size M' is part of the attack.
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